im talking about what's the next book,tuts,references,etc
note : PLEASE BE SPECIFIC, and please provide some links for it
i already know :
1-regular expressions
2-some MySQL things(INERT, ALTER, DELETE, INNER JOIN), also i can manage the database(little bit)
3-GD library
3-i can secure my database(little bit)
4-using files to store things(images, etc)
5-Eliminate Duplicate Code
6-little bit more easy stuff like custom functions and some built-in PHP functions
the book, tut or reference must be OOP